condition mean min max ZT0-3 14.223274180499999 9.746577811 18.69997055 ZT4-7 11.387921000999999 8.613680467 14.162161535 ZT8-11 20.33637745 16.837180325 23.835574575000003 ZT12-15 18.636645005000002 18.132847015000003 19.140442995 ZT16-19 12.58034588 12.13330561 13.02738615 ZT20-23 11.310789785 10.534404555 12.087175015